Odisha Board Solutions for Chapter: Thermodynamics, Exercise 4: MULTIPLE CHOICE QUESTIONS

${\mathrm{H}}_{2 \left(\mathrm{g}\right)}+{\mathrm{I}}_{2 \left(\mathrm{g}\right)}\to 2{\mathrm{HI}}_{\left(\mathrm{g}\right)}, ∆\mathrm{H}=-12.40 \mathrm{kcals},$ Heat of formation of $\mathrm{HI}$ will be.

Combustion of methane:

For which reaction, $\mathrm{S}$ (entropy) will be maximum?

The total entropy change for a system and its surrounding increases, if the process is

When ice melts into water, entropy

Heat of combustion is always 

Energy required to dissociate $4 \mathrm{grams}$ of gaseous hydrogen into free gaseous atoms is $208 \mathrm{kcals}$, at ${25}^{\mathrm{o}} \mathrm{C}$. The bond energy of $\mathrm{H}-\mathrm{H}$  bond will be

If a refrigerator door is opened then we get